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Title: Process for producing low-sulfur boiler fuel by hydrotreatment of solvent deashed SRC

Abstract

In this invention, a process is disclosed characterized by heating a slurry of coal in the presence of a process-derived recycle solvent and passing same to a dissolver zone, separating the resultant gases and liquid/solid products therefrom, vacuum distilling the liquid/solids products, separating the portions of the liquid/solids vacuum distillation effluent into a solid ash, unconverted coal particles and SRC material having a boiling point above 850.degree. F. and subjecting same to a critical solvent deashing step to provide an ash-free SRC product. The lighter liquid products from the vacuum distillation possess a boiling point below 850.degree. F. and are passed through a distillation tower, from which recycled solvent is recovered in addition to light distillate boiling below 400.degree. F. (overhead). The ash-free SRC product in accompanyment with at least a portion of the process derived solvent is passed in combination to a hydrotreating zone containing a hydrogenation catalyst and in the presence of hydrogen is hydroprocessed to produce a desulfurized and denitrogenized low-sulfur, low-ash boiler fuel and a process derived recycle solvent which is recycled to slurry the coal in the beginning of the process before heating.

Inventors:
 [1];  [2]
  1. (Emmaus, PA)
  2. (Perkiomenville, PA)
Issue Date:
Research Org.:
INTERNATIONAL COAL REFINING CO
OSTI Identifier:
865550
Patent Number(s):
4534847
Assignee:
International Coal Refining Company (Allentown, PA) OSTI
DOE Contract Number:  
AC05-78OR03054
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; producing; low-sulfur; boiler; fuel; hydrotreatment; solvent; deashed; src; disclosed; characterized; heating; slurry; coal; presence; process-derived; recycle; passing; dissolver; zone; separating; resultant; gases; liquid; solid; products; therefrom; vacuum; distilling; solids; portions; distillation; effluent; ash; unconverted; particles; material; boiling; 850; degree; subjecting; critical; deashing; step; provide; ash-free; product; lighter; possess; below; passed; tower; recycled; recovered; addition; light; distillate; 400; overhead; accompanyment; portion; derived; combination; hydrotreating; containing; hydrogenation; catalyst; hydrogen; hydroprocessed; produce; desulfurized; denitrogenized; low-ash; beginning; unconverted coal; zone containing; solid products; coal particle; recycle solvent; hydrogenation catalyst; liquid products; coal particles; liquid product; solid product; light distillate; vacuum distillation; src product; solvent deashing; disclosed characterized; boiling below; boiler fuel; process derived; distillation tower; critical solvent; derived solvent; /208/

Citation Formats

Roberts, George W., and Tao, John C. Process for producing low-sulfur boiler fuel by hydrotreatment of solvent deashed SRC. United States: N. p., 1985. Web.
Roberts, George W., & Tao, John C. Process for producing low-sulfur boiler fuel by hydrotreatment of solvent deashed SRC. United States.
Roberts, George W., and Tao, John C. Tue . "Process for producing low-sulfur boiler fuel by hydrotreatment of solvent deashed SRC". United States. https://www.osti.gov/servlets/purl/865550.
@article{osti_865550,
title = {Process for producing low-sulfur boiler fuel by hydrotreatment of solvent deashed SRC},
author = {Roberts, George W. and Tao, John C.},
abstractNote = {In this invention, a process is disclosed characterized by heating a slurry of coal in the presence of a process-derived recycle solvent and passing same to a dissolver zone, separating the resultant gases and liquid/solid products therefrom, vacuum distilling the liquid/solids products, separating the portions of the liquid/solids vacuum distillation effluent into a solid ash, unconverted coal particles and SRC material having a boiling point above 850.degree. F. and subjecting same to a critical solvent deashing step to provide an ash-free SRC product. The lighter liquid products from the vacuum distillation possess a boiling point below 850.degree. F. and are passed through a distillation tower, from which recycled solvent is recovered in addition to light distillate boiling below 400.degree. F. (overhead). The ash-free SRC product in accompanyment with at least a portion of the process derived solvent is passed in combination to a hydrotreating zone containing a hydrogenation catalyst and in the presence of hydrogen is hydroprocessed to produce a desulfurized and denitrogenized low-sulfur, low-ash boiler fuel and a process derived recycle solvent which is recycled to slurry the coal in the beginning of the process before heating.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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